/*
 * Copyright (c) 2025, NVIDIA CORPORATION.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <FdChannelClient.h>

FdChannelClient::FdChannelClient(int const channelFd)
    : m_channelFd(channelFd)
{}

bool FdChannelClient::IsValid() const
{
    return (-1 != fcntl(m_channelFd, F_GETFD));
}

std::error_code FdChannelClient::WriteAll(std::span<char const> buf) const
{
    while (!buf.empty())
    {
        if (auto written = write(m_channelFd, buf.data(), buf.size()); written >= 0)
        {
            buf = buf.subspan(written);
            continue;
        }

        if (errno == EINTR || errno == EAGAIN)
        {
            continue;
        }

        return std::error_code(errno, std::generic_category());
    }
    return {};
}
